Warp-stop-motion detector.



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D D MAHDNEY WADP STOP MOTION DETECTOR;

(Applicatiog med Dec. 9, 1901.) (Nu Model.)

mi Nonms Przns co.. PHoTaLIYHu.. WASHINGTON. uy c.

UNITED STATES PATENT .'Orricaf* -4 Danisv nivrAHoNEY, or iioPKtN'roN,MASSACHUSETTS, ASSIGNOR To.` DRAPER COMPANY, or noPEDALE,MASSACHUSETTS'Aconroan- TION OF MAINE.

wARP-sToP-MOTION DETECTOR.

SPECIFICATION foiming part of -lLetters Patent No. 698,123,6.ated April.22, 1902. Application ledlDecemlJer 9, 1901. Serial No. 85,123.' (Nomodel.)

To all whom it vmtycobccrn:

Be it known that I, DENIS D. MAHONEY, a citizen of the United States,residing at Hopkinton, in the county of Middlesex and State ofMassachusetts, have invented an Improvement in Warp Stop MotionDetectors, 0f which the followingdes'cription, in connection with theaccompanying drawings, is a specification, like letters onv the drawingsrepre- 4senting like parts.

This invention has for itsobject the production of a novel and efficientdetector for s s Warp stop motionv apparatus of the type wherein thestopping meansis governed as to its operation by or throughcontrolling-detectors which are normally maintained in inoperativeposition by the warp-threads.

As will more fully appear hereinafter, the detector may loe used as adetector only in a warp-stop-motion apparatus, or it may with equalreadiness be employed in a loom as a detector-heddle, performing-thefunctions of a heddtle and a detector for the Warp stop-motion.

The various novel features of my invention will'be hereinafter fullydescribed, and particularly pointed out in the following claims.

vFigure 1 is a side elevation of a detector embodying one form of myinvention. Fig. 2 is a greatly-enlarged detail, also in side elevation,of the warp-receiving portion of the detectors to morclearly show thewear members.

, Fig. 3 is a longitudinal section on the line 3 3,

Fig. 2. Fig. 4 is an enlarged perspective view of one of the wearmembers detached; and

Fig. 5 is an edge View, on an exaggerated scale,

of parts of two adjacent detectors, showing the separation thereofadjacent their warpreceiving openings.

I shall hereinafter by the term detector include a detector-heddle, aswell as a detector pure and Simple, for warp-stop-motion apparatus.

Referring to Fig. 1, I have shown a Well.

known-form of detector, preferably made as an elongated narrow strip aof thin flat sheet metal, preferably steel, and herein shown as Y havinga longitudinal slot a' at or near one end to receive a supporting-bar(not shown) and relatively to which the detector has a limited verticalmovement when lin use. The warp-receiving openingy azis shown assubstantially rectangular vin yshape. and quitey large, the uprightsides being formed-by the narrow portions a? of the detector body, theseopenings being commonly stamped or punched out when the detector isinadeorf thereafter, as desired. f

In order to present smooth and easy bearing-surfaces for the warp-yarnto run over, I

have hereinl applied transverse wear members to the upper and loweredges of the openv ing a2, and in Fig. l'one'vof these members orlstruts b is shown on a greatly-enlarged scale of substantially circularcross section and havinglongitudinal slotsb' atits ends. These smembers,.made of brass or other suitable material, are letintothewarp-receiving openj ing, the slotted ends embracing the uprightside portions 0.3, and when said members are` in place at the top andbottom of the opening adjacent its edges theyarey rigidly secured inplace by compression in suitable dies and by j y brazing or soldering,if desired. The pressure somewhatattens the outer faces ofthe wearmembers, as at bx; but the portions within the sidesof the openingpresent convex bearingsurfaces, over which the Warp-yarn can run easilyand without undue friction.A When such detectors are in use, they arearranged in series side by side, substantially parallel,

to the direction'of warp travel, in well-known manner, and the Wearmembersb at such time f serve to protect the yarn from contact with Vadjacent detectors.

By reference to Fig. 5 it will be seen that s the diameter of themembers or struts b is f greater than the thickness ofthe detector, sothat they project beyond the flat faces of the detector, and theprojecting portions ofthe wear members of one detector bear againstthose of the adjacent detectors or against the dat faces thereof, and somaintain sufficient lateral separation between the detectors to preventthe warps led through one from coming in contact with its adjacentfellows.

My invention is not restricted to the precise construction andarrangement shown, as

the same may be modified in various particulars without departing fromthe spirit and scope of the invention.

Having described my invention, what I claim as new, and desire to secureby Letters Patent, is-

l. As a new article of manufacture, a detector-heddle forlooms, made ofan elongated, narrow strip of sheet metal having a longitudinal slot anda warp-receiving opening, and transverse, rounded wear members ofgreater thickness than the strip, secured in place at the top and bottomofthe warp-receiving opening, to present convex bearing-surfaces for thewarp aud laterally extended beyond the flat faces of the heddle.

2. .As a new article of manufacture, a war stop-motion detector made ofau elongated, narrow strip of sheet metal having a substantiallyrectangular warp-receiving opening, and Wear members substantially roundin cross-section and having slotted ends, let into the said opening atthe top and bottom thereof to present convex bearing-surfaces for theWarp, the slotted ends embracing the sides of the opening.

As a new article of manufacture, a warpstop-motion detector made of anelongated, narrow strip of sheet metal having a substantiallyrectangular Warp-receiving opening, and means secured within saidwarp-receiving opening to present convex bearing-surfaces for the warp,said means projecting beyond the fiat faces of the detector,substantially as and for the purposenset forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

DENIS D. MAIIONEY.

Witnesses:

GEORGE O'rls DRAPER, ERNEST WARREN IVooD.

